Why do some places avoid "new" in the New Year?

This is an expression of China and heavenly stems and earthly branches. The ancients used heavenly stems and earthly branches to indicate that the days (usually good days/bad days in the Old Yellow Calendar) have four auspicious days every 60 days. There are four ugly days. There are 1 ugly days in 60 days.

The shopkeeper doesn't taste the sauce. It shows that Sunrili is not suitable for making sauce. If you cook with food, it won't taste good!

Ugly people don't go back to China without a crown. It is not appropriate to wear a hat and new clothes when the weather is bad. If you wear a hat and new clothes, you can't come back when you go out.

Similar to the taboo we often say.